Toluene-benzene concentration ratio as a tool for characterizing the distance from vehicular emission sources

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An attempt was made to assess the 'medium distance' of sampling sites from vehicular emission sources. Two parameters, the 'site ratio' and the 'traffic-equivalent distance', were calculated from the time-weighted average (TWA) concentrations of two selected volatile air pollutants, benzene and toluene. The concept of the model was based on the considerable difference between the rate constants of benzene and toluene with OH radicals. It was shown that these parameters are more reliable indicators of the distances of emission sources than the absolute TWA concentrations which are greatly influenced by the intensities of the emission sources, the location of the sampling site, end the duration of sampling.

Original languageEnglish
Pages (from-to)2869-2872
Number of pages4
JournalEnvironmental Science and Technology
Issue number10
Publication statusPublished - Oct 1 1997


ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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